Soooooooo….Just looking at trip planner, is this the new trip planner Good Sam? If it is it sucks, seems you can't change routes. Rather the old trip planner.
I bought Good Sams and didn't particularly like it either. I have started to use freecampingsites.net. They have a trip planning option that will at least list campsites within 10 miles from your route and I've found that very helpful.